Lyons, 25, is making his third trip to the bigs, having made seven starts for the Cardinals this season. The rookie went 2-5 in th majors, winning his first two appearances before losing five straight. He posted an ERA of 5.35 and struck out 26 while walking 12.

In Memphis, the ninth round pick has gone 7-2 with an ERA of 3.39 and 84 strikeouts to do 19 walks.

His last appearance was the second game of a doubleheader on July 30 against the Pittsburgh Pirates.